Summer is a hot and rainy season. In many places, it will continue to rain and cause damage to the crops in the field. At this time, it is just that the summer corn is in the stage of seedling stage. Some friends ask, when the summer corn seedling period, if the rain What should I do? What effect will it have on corn growth? In addition, what are the preventive and remedial measures? Let's take a look at the answers to these questions.
1. The hazard of flooding in summer maize seedlings
1. Root growth is hindered. Because of the accumulation of water in the field, the contact between the roots and the air is isolated, resulting in the roots not being able to breathe normally, and the growth is blocked. Some subsequent problems will occur (such as weak seedlings, late fall, etc.).
2. The grass is seriously damaged. After the corn seedlings encounter water accumulation, the growth is inhibited, but the weeds are not. The weed growth ability is strong. When the stagnant water recedes, it grows like a day, and it does not prevent it in time. Big harm.
3, soil compaction, summer rain and more water, dry is also fast, such as today there is a lot of water, when it is slowly discharged, there are several days of high temperature solar weather, the soil in the ground will have symptoms of consolidation, the same Will affect the normal growth of corn.
4. The pests and diseases are aggravated. As the saying goes, "A heavy rain and a disaster", the disaster here is not only about floods, but also disasters of pests and diseases. Under normal circumstances, after heavy rains, it is an important period for the outbreak of pests and diseases, and it is not timely to fight drugs. The consequences are not conceived.
5, lodging, the corn in the seedling period will also fall, although the seedlings are small, but the heavy rain and windy weather will also occur.
2. Remedial measures for flooding of summer maize seedlings
1. Drainage
Needless to say, the timely drainage is the first step. You can wait for the rain to stop or go during the rain. However, it is recommended that the drainage measures be taken before the rain, according to the weather forecast.
2, rowing and cultivating
After the rainwater is discharged, when the people can go down in the field, they should plan and plough the soil in time. There are two purposes. On the one hand, it avoids soil compaction, enhances the permeability of the soil, and is beneficial to the roots and the normal growth of corn. On the one hand, there is also a certain control effect on weeds, killing two birds with one stone.
3, weeding
As mentioned above, rowing and cultivating can prevent some weeds. If there are too many weeds in the field, there is no land for herbicides. Find a suitable weather. Before 10 am, after 4 pm, go to the ground. Spraying herbicides, because it is in the seedling stage, it is the appropriate period for weeding (more than 8 leaves should pay special attention), you can choose nicosulfuron, mesotrione, atrazine, binary or ternary compounding agent Spray it.
4. Prevention of pests and diseases
In the case of insect pests, in addition to underground pests (è¼è›„, 蛴螬, golden worm, earthworm, etc.), the ground part also has thrips, armyworms, etc. Common preventive agents are, underground pests can be rooted with phoxim or chlorpyrifos; If you can use imidacloprid or acetamiprid; if it is an armyworm, you can use a salt.
There are also many diseases at the seedling stage, such as seed blight, rough disease, stem-based rot, etc., the hazards are very large, and the preventive agents are separate, the seedling blight can be treated with carbendazim, carbendazim and the like; Imidazoline + fungiqing + potassium dihydrogen phosphate (insecticide + antiviral agent + foliar fertilizer) is used for comprehensive treatment; stem-based rot can choose mancozeb, carbendazim, chlorothalonil, etc. , about 10 days apart, come again.
In addition, if the disaster is particularly serious, after the corn has fallen, the roots are washed up, and the seeds are destroyed in time. Some varieties with shorter growth periods can be replanted, and other crops can be replanted to reduce losses.
Regarding the hazards and remedial measures of flooding in the corn seedling stage, Hui Nongwang Xiaobian said so much, there are more rains in summer, and friends who want to grow corn pay more attention. Since they have worked hard, they manage it well. Although the price market in the past two years is not particularly good, but the output is more, the income will increase a little. What do you say?
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